HR: 08:00h
AN: A11D-01    [PDF]
TI: Adaptive Grids in Climate Modeling: Concept and First Results
AU: * Herzog, M
EM: herzogm@umich.edu
AF: University of Michigan, 2455 Hayward St., Ann Arbor, MI 48109 United States
AU: Jablonowski, C
EM: cjablono@umich.edu
AF: University of Michigan, 2455 Hayward St., Ann Arbor, MI 48109 United States
AU: Oehmke, R C
EM: oehmke@umich.edu
AF: University of Michigan, 2455 Hayward St., Ann Arbor, MI 48109 United States
AU: Penner, J E
EM: penner@umich.edu
AF: University of Michigan, 2455 Hayward St., Ann Arbor, MI 48109 United States
AU: Stout, Q F
EM: qstout@umich.edu
AF: University of Michigan, 2455 Hayward St., Ann Arbor, MI 48109 United States
AU: van Leer, B
EM: bram@umich.edu
AF: University of Michigan, 2455 Hayward St., Ann Arbor, MI 48109 United States
AB: One of the most important advances needed in global climate models is the development of models that can reliably treat convection. This project will result in a climate model that self-adjusts the grid resolution and the complexity of the physics model to the atmospheric flow conditions. Adaptive grid techniques are being applied to a parallel version of NASA's next generation climate model, the NASA/NCAR Finite-Volume Community Climate Model, which has been developed at the NASA Goddard Space Flight Center (GSFC, Data Assimilation Office). This global hydrostatic model is based on NCAR physics and the so-called Lin-Rood finite volume dynamical core that provides highly efficient algorithms for high performance computing. The non-hydrostatic model will be based on an extension of the Lin-Rood finite volume dynamical core. It will keep the concept of a Langrangian vertical coordinate. Special considerations are made to ensure conservation of total mass and heat. The adaptive model design utilizes a spherical grid library that is based on a computationally efficient block-structured data layout. This communication library for parallel processors will also enable a reduced grid design near polar regions. We will discuss the basic model concept with the focus on the adaptive grid design and the formulation of the non-hydrostatic model. We will present first results from runs with the block-structured code.
DE: 3314 Convective processes
DE: 3319 General circulation
DE: 3337 Numerical modeling and data assimilation
SC: Atmospheric Sciences [A]
MN: 2003 Fall Meeting